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When the ELISA test is combined with Western Blot, the rate of false positives is extremely low, and diagnostic accuracy is very high (see below). HIV antibody tests are highly sensitive, meaning they react preferentially with HIV antibodies, but not all positive or inconclusive HIV ELISA tests mean the person is infected by HIV.
The western blot (sometimes called the protein immunoblot), or western blotting, is a widely used analytical technique in molecular biology and immunogenetics to detect specific proteins in a sample of tissue homogenate or extract. [1] Besides detecting the proteins, this technique is also utilized to visualize, distinguish, and quantify the ...
[28] [29] ELISA can also be used in toxicology as a rapid presumptive screen for certain classes of drugs. Enzyme-linked immunosorbent assay plate. The ELISA was the first screening test widely used for HIV because of its high sensitivity. In an ELISA, a person's serum is diluted 400 times and applied to a plate to which HIV antigens are attached.
If the result of either duplicate test is reactive, the specimen is reported as repeatedly reactive and undergoes confirmatory testing with a more specific supplemental test (e.g., a polymerase chain reaction (PCR), western blot or, less commonly, an immunofluorescence assay (IFA)). Only specimens that are repeatedly reactive by ELISA and ...
The CDC Classification System for HIV Infection is the medical classification system used by the United States Centers for Disease Control and Prevention (CDC) to classify HIV disease and infection. [1] The system is used to allow the government to handle epidemic statistics and define who receives US government assistance.
April - The FDA approves a Western blot test as a more precise test for the presence of HIV antibodies than the ELISA test. [76] ' May 28 - Playwright and performer Charles Ludlam dies of AIDS-related PCP pneumonia. July 2 - Musical theatre director, writer, choreographer, and dancer Michael Bennett dies of AIDS-related lymphoma at the age of ...
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